Home |
Search |
Today's Posts |
#19
|
|||
|
|||
Field Day?
Mike Coslo wrote:
N2EY wrote: I think they are using a laptop, because I don't know any desktops that run on 12 volts DC (though there are probably some). It sounds to me like what they did was to use a laptop with a charging cord meant to go into an auto accessory power socket. That way, the primary power comes from the 12 volt power system they need for the rig, and the laptop's internal battery is used for backup in case there is some sort of power interruption. FD lasts more than 24 hours, and I don't know any laptops whose batteries will run that long. Using external power means no interruptions. An awful lot of laptops run on 18 Volts DC. My IBM's Dells, snd most recently, a Toshiba. (actually it is 19 Volts) If you aren't going to run them off 120 volts and their own power supply, you'll need to run a DC to DC p.s. - 73 de Mike KB3EIA - I so do dislike quoting myself but, "The logging PC will have it's own homebrew DC-DC boost converter." The laptop PC's AC power supply produces 16VDC @ 4A. The DC-DC boost converter produces regulated 16VDC @ 4.5A. The boost converter for the rig similarly produces 14VDC @ 25A. Both units are dead quiet in terms of EMI, and aren't upset in the presence of RF. Bryan WA7PRC |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Near field vs Far field measurements at 2M | Antenna | |||
Anybody go to field day? | CB | |||
WTB: FT-1000 Field or MKV .. | Equipment | |||
OT Field Day | CB | |||
near vs far field ? | Antenna |